Ray Donovan revolves around a professional "fixer" for the rich and famous in Los Angeles -- the title character to be played by Schreiber -- as he balances his work demands and complex family brought on when his father, Mickey (Jon Voight), is unexpectedly released from prison. Paula Malcomson, Eddie Marsan, Dash Mihok, Katherine Moennig and Pooch Hall co-star.

Arquette (Pulp Fiction) will play Linda, a former starlet-turned-screenwriter who befriends Ray's father, Mickey. The gig marks Arquette's latest guest role following turns on Girls, Royal Pains and Private Practice. She's repped by Talent Works and Lovett Management.

She joins a cast that includes recent additions James Woods and Brooke Smith, among others.

Showtime will move Dexter up to a spring premiere June 30 and use the Michael C. Hall-Jennifer Carpenter starrer to launch Ray Donovan, which premieres the same night at 10 p.m.